人人爽人人干,男女污视频在线观看,黑帮老大和我的365日2,久久亚洲成人av,亚洲日本一区二区三区,99er6免费热在线观看精品,亚洲一区免费看,91麻豆产精品久久久久久夏晴子

Disc brake History

 

Early experiments

Development of disc brakes began in England in the 1890s.

The first caliper-type automobile disc brake was patented by Frederick William Lanchester in his Birmingham factory in 1902 and used successfully on Lanchester cars. However, the limited choice of metals in this period meant that he had to use copper as the braking medium acting on the disc. The poor state of the roads at this time, no more than dusty, rough tracks, meant the copper wore quickly making the system impractical.

The American Crosley Hot Shot is often given credit for the first production disc brakes. For six months in 1950, Crosley built a car with these brakes, then returned to drum brakes. Lack of sufficient research caused reliability problems, such as sticking and corrosion, especially in regions using salt on winter roads. Drum brake conversions for Hot Shots were quite popular. The Crosley disc was a Goodyear development, a caliper type with ventilated disc, originally designed for aircraft applications.

Chrysler developed a unique braking system, offered from 1949 to 1953. Instead of the disc with caliper squeezing on it, this system used twin expanding discs that rubbed against the inner surface of a cast-iron brake drum, which doubled as the brake housing. The discs spread apart to create friction against the inner drum surface through the action of standard wheel cylinders. Because of the expense, the brakes were only standard on the Chrysler Crown and the Town and Country Newport in 1950. They were optional, however, on other Chryslers, priced around $400, at a time when an entire Crosley Hot Shot retailed for $935. This four-wheel disc brake system was built by Auto Specialties Manufacturing Company (Ausco) of St. Joseph, Michigan, under patents of inventor H.L. Lambert, and was first tested on a 1939 Plymouth. Chrysler discs were "self energizing," in that some of the braking energy itself contributed to the braking effort. This was accomplished by small balls set into oval holes leading to the brake surface.When the disc made initial contact with the friction surface, the balls would be forced up the holes forcing the discs further apart and augmenting the braking energy. This made for lighter braking pressure than with calipers, avoided brake fade, promoted cooler running, and provided one-third more friction surface than standard Chrysler twelve-inch drums. Today's owners consider the Ausco-Lambert very reliable and powerful, but admit its grabbiness and sensitivity.

Racing breakthrough

Reliable caliper-type disc brakes first appeared in 1953 on the Jaguar C-Type racing car. These brakes helped the company to win the 1953 24 Hours of Le Mans,developed in the UK by Dunlop. That same year, the aluminum bodied Austin-Healey 100S, of which 50 were made, was the first car sold to the public to have disc brakes, fitted to all 4 wheels.

Mass production

The first mass production use of the modern disc brake was in 1955, on the Citroën DS, which featured caliper-type front disc brakes among its many innovations. These discs were mounted inboard near the transmission, and were powered by the vehicle's central hydraulic system. This model went on to sell 1.5 million units over 20 years with the same brake setup.

The Jensen 541, with four-wheel disc brakes, followed in 1956.

Disc brakes were most popular on sports cars when they were first introduced, since these vehicles are more demanding about brake performance. Discs have now become the more common form in most passenger vehicles, although many (particularly light weight vehicles) use drum brakes on the rear wheels to keep costs and weight down as well as to simplify the provisions for a parking brake. As the front brakes perform most of the braking effort, this can be a reasonable compromise.

Many early implementations for automobiles located the brakes on the inboard side of the driveshaft, near the differential, while most brakes today are located inside the wheels. An inboard location reduces the unsprung weight and eliminates a source of heat transfer to the tires.

Historically, brake discs were manufactured throughout the world with a strong concentration in Europe and America. Between 1989 and 2005, manufacturing of brake discs migrated predominantly to China.

2016-09-27 23:56:04
主站蜘蛛池模板: 久久久久亚洲最大xxxx| 久久婷婷国产香蕉| 年轻bbwbbw高潮| 国产一区不卡视频| 国产精品日韩三级| 色乱码一区二区三区网站| 亚洲乱亚洲乱妇28p| 亚洲欧美另类国产| 欧美一区二区三区爽大粗免费| 91精品久久久久久综合五月天| 最新国产精品自拍| 国产欧美久久一区二区三区| 日韩夜精品精品免费观看| 一区二区在线精品| 久久人做人爽一区二区三区小说| 猛男大粗猛爽h男人味| 91免费国产视频| 久久艹国产精品| 免费久久99精品国产婷婷六月 | xoxoxo亚洲国产精品| 中文字幕一级二级三级| 少妇又紧又色又爽又刺激的视频| 特级免费黄色片| 少妇太爽了在线观看免费| 91一区二区三区在线| 91人人精品| 国产极品一区二区三区| 国产乱色国产精品播放视频| 夜夜躁狠狠躁日日躁2024| 国产色一区二区| 日韩一级免费视频| 97视频精品一二区ai换脸| 99精品国产一区二区三区麻豆 | 91久久国产露脸精品国产| 国产中文字幕91| 国产91色综合| 精品国产一区二区三区高潮视| 国产乱一区二区三区视频| 91av中文字幕| ass韩国白嫩pics| 亚洲一区中文字幕| 国产精品久久久区三区天天噜| 高清国产一区二区| 8x8x国产一区二区三区精品推荐 | 91久久精品在线| 国产乱淫精品一区二区三区毛片| 日本一区二区在线电影| 国产麻豆一区二区三区在线观看 | 麻豆天堂网| 91麻豆精品国产91久久| 国产在线一卡二卡| 999国产精品999久久久久久| 中文字幕一区一区三区| 亚洲va欧美va国产综合先锋| 久久99精品国产一区二区三区| 国产高清在线一区| 亚洲欧美精品suv| 99er热精品视频国产| 99国产精品免费| 国产高清在线观看一区| 一区二区三区在线观看国产| 97欧美精品| 91久久香蕉国产日韩欧美9色| 456亚洲精品| 亚洲国产欧美一区| 91精品视频免费在线观看| 国产精品偷伦一区二区| 色一情一乱一乱一区免费网站 | 午夜av电影院| 精品一区在线观看视频 | 午夜伦全在线观看| 99久久婷婷国产综合精品电影 | 久久久久久久亚洲视频| 福利片一区二区三区| 999国产精品999久久久久久| 亚洲精品日韩激情欧美| 久久综合伊人77777麻豆| 国产偷国产偷亚洲清高| 国产伦精品一区二区三区无广告| 少妇高潮ⅴideosex| 一区精品二区国产| 欧美一区视频观看|